Handle for portable tools



July 26, 1932. i MEUMER 1,868,712

HANDLE FOR PORTABLE TOOLS Filed Feb. 4; 1928 I N VEN TOR N Leo/7 FMean/er A TTORNE Y.

Patented July 26, 1932 STATES PATENT OFFICE LEON F. MEUNIER, OFCLEVELAND, OHIO, ASSIGNOB TO CHICAGO PNEUMATIC TOOL COMPANY, OF NEWYORK, N. Y., A CORPORATION OF NEW JERSEY HANDLE FOB PORTABLE TOOLSApplication filed February 4, 1928.

This invention relates to power tools of the portable or hand-operatedtype used for stud setting, nut running, screw driving and similaroperations, and more particularly to the handles by which such tools aresupported.

A principal object of the invention is to relieve the operator of such atool of at least a part of the severe shock or recoil which heexperiences when the securing member is driven home and the torque ofthe tool is trans mitted back to the operator. Other objects will beapparent from the detailed description, which follows In order toillustrate the invention, concrete embodiments thereof are shown in theaccompanying drawing in which:

Fig. 1 is a top plan view partly cut away of one form of the invention;

Fig. 2 is a similar view showing a modification; and

Fig. 3 is a side elevational view on a reduced scale of the tool shownin Fig. 1.

In the drawing a portable power tool of any suitable type, operatedeither by fluid pressure or by electricity, preferably the lat ter, isshown at A having an offset rotatable spindle projecting therefrom andindicated diagrammatically at a. Tools of the type shown are usuallysupported by opposed so handles, such as 8 and 4, one of which, such as3, may have control means for the motor of the power tool, such asswitch 5, if the motor is electrically driven.

At least one of the handles, preferably handle l, is arranged to relievethe operator of at least a portion of the shock resulting from thesudden retarding or stopping of spindle a by the work. In the formshown, handle 4 is pivoted at 6 to tool A for limited swinging movementin a plane transverse to the axis of the spindle, the handle having aportion la extending between spaced ears 7 projecting from a base 8secured in any suitable manner to the casing of tool A preferably on theside adjacent the ofiset spindle a. The base itself serves as a stop forswinging movement of handle 4 in one direction and one of the securingmembers for the base, such as elongate bolt 9 serves as a stop in theother direction. Handle 4 provides a Serial No. 251,804.

recess 4?) at right angles to base 8 and remote from pivot 6, the recessbeing open toward the base and having a reduced bore 40 at its outerend. Bolt 9 extends through bore 40 and axially of recess 56, the headof the bolt forming a stop.

Resilient means are provided within recess lb for yieldingly maintaininghandle 1- at the outer limit of its swinging movement and for resistingmovement of the handle toward base 8. One arrangement for this purposeprovides a coil spring 10 encircling bolt 9 and interposed between base8 and the end wall of the recess. When the tool is in operation spindlea rotates in the direction indicated by the small arrow and when thespindle is stopped by the work the reaction turns the tool A inthedirection indicated by the large arrow, this reaction or recoil beingabsorbed entirely, or to a very large extent, by the disclosedarrangement including the pivotal mounting of handle 4 and the spring10.

In the embodiment of the invention disclosed in Fig. 2 both of theopposed handles 11 and-12 are arranged for pivotalmovement relative totool A, preferably by being connected together through a substantial Ushape frame 13 extending between and pivoted to spaced ears 7 on base 8,which base is identical with the one shown in Fig. 1. In its structuralfeatures and manner of operation the modified handle does not differsubstantially from that shown in Fig. 1. Accordingly, frame 8 has arecess 13?) through which extends securing bolt 9 and in which isdisposed the coil spring 10. In the operation of the form shown in Fig.2-both grip handles 11 and 12 move in unison in relation to tool A inabsorbing the reaction of the tool when spindle a is stopped orretarded.

While preferred forms of the invention are herein shown and described,it is to be understood that the invention is not limited to the specificdetails thereof, but covers all changes, modifications and adaptationswithin the scope of the appended claims;

I claim as my invention:

1. The combination with a portable power tool of a handle attachmenttherefor having a base fixedly secured to said tool, a handle pivotallymounted on said base for swinging movement, a securing member for saidbase extending therefrom to provide a fixed stop for said handle, andresilient means yieldingly maintaining said handle in contact with saidstop.

2. The combination with a portable power tool of a handle attachmenttherefor having a base fixedly secured to said tool, a handle pivotallymounted on said base for swinging movement, a securing member for saidbase providing a lixed stop for said handle, and resilient meansencircling said member for yieldingly maintaining said handle in contactwith said stop.

3. The combination with a portable power tool having an offset rotatablespindle of a handle attachment therefor having a base, bolts securingsaid base to said tool adjacent said spindle, a handle pivotally securedto said base for swinging movement, said handle having a recess remotefrom its pivot, one of said bolts extending through said recess andarranged to limit the swinging movement of said handle away from saidbase, and a coil spring encircling said last-named bolt and seated insaid recess for resisting movement of said handle toward said base.

4, A handle device for attachment to apower tool comprising a base, earsprojecting from said base, a handle having a portion received betweensaid ears, a pivot extending through said ears and through said portion,means providing a lixed stop for limiting swinging movement of saidhandle on said pivot away from said base, and resilient means on saidstop means for resisting movement of said handle toward said base.

5. A handle device for attachment to a power tool comprising a base,cars projecting from said base, a handle having a portion extendingbetween said ears and pivoted thereto for swinging movement, said handlehaving a recess in spaced relation to its pivot and a reduced borecommunicating with said recess, a securing bolt for said base extendingaxially through said bore and said recess, the head of said bolt forminga stop to limit swinging movement of said handle away from said base,and a coil spring encircling said bolt within said recess for yieldinglyresisting swinging movement of said handle toward said base.

Signed by me at Cleveland, in the county of Cuyahoga and State of Ohiothis 28th day of January, 1928.

LEON F. MEUNIER.

